Comparing Blade Steels

Steel—or perhaps more appropriately, blade material—is the heart of every knife. The heat treatment of that steel is its soul. For most of our history, Spyderco has been a leading force in pushing the envelope of the steels used in the manufacture of factory-made knives. Collectively, we have featured more different grades of steels in our products than any other production knife company and still dominate the industry by offering over 30 steels in our current product line.

Decades ago, when we began to showcase a broader spectrum of steels in our products, we also felt the responsibility to educate our customers about knife steels and the distinctive properties that make them unique.

Since the chemical composition of a steel—the proportions of the key elements and alloys that compose it—defines its properties as a blade material, our first step was to create a detailed Steel Chart. Published in our annual catalogs and later on our website, we’ve also shared this ever-evolving resource in laminated brochures, pocket references, and even posters. As one of the first knife manufacturers to create and share this reference, our Steel Chart set a strong standard subsequently emulated by other companies.

In its printed form, the Spyderco Steel Chart provides an alphanumeric list of all the steels we currently use or historically have used in our products. For completeness, it also includes a number of other blade materials that are traditionally associated with knifemaking. 

For each of these steels, we provide a detailed breakdown of its chemical composition. Specifically, it provides the proportions of the key alloying elements that define the steel’s properties, including carbon, chromium, cobalt, copper, manganese, molybdenum, nickel, niobium, nitrogen, phosphorus, silicon, sulfur, tungsten, and vanadium. It also identifies the steel as either a stainless steel or a non-stainless tool steel.

To compare two or more steels in detail, it helps to see their alloy compositions side by side. Unfortunately, as the number of steels detailed in the chart increased, this became much more difficult. Our solution was to create an interactive Steel Chart on our website. It enables the user to select up to five different steels and conveniently display their alloy compositions side by side. This view allows the quick, easy, comparison of multiple blade materials, the elements they contain, and the relative amounts of each.

It is particularly helpful in understanding very similar steels made by different foundries and the evolution of specific steels from one specific alloy composition to another. This handy tool works in concert with the Steel Elements page of our website, which provides detailed explanations of the effects of each alloying element on the performance characteristics of the steel. Together, they make it easy and fun to learn about the many different blade steels and their unique properties.

Spyderco’s commitment to exploring blade steels extends far beyond reference materials like the Steel Chart. Many of our most iconic knife models are also offered in multiple steel variations, allowing customers to experience firsthand how different blade materials influence cutting performance, edge retention, toughness, corrosion resistance, sharpening characteristics, and overall feel in use. Models like the Delica®, Endura®, Military™, Military™ 2, Para Military® 2, Para® 3, UK Penknife™, Native® 5, Dragonfly™ 2, Ladybug® 3, Manbug®, Sage™ 5, Native Chief®, Manix® 2, Tenacious®, Ambitious™, Persistence®, and Resilience® have all been produced in a wide variety of steels over the years. For many knife enthusiasts, discovering a favorite knife model is only the beginning of the journey. The next step is determining which steel best suits their needs, environment, maintenance preferences, and personal priorities.

Different steels excel in different ways. Some are designed to maximize edge retention and allow the knife to cut longer between sharpenings. Others prioritize toughness and durability to better withstand demanding tasks and high-impact use. Some steels are specifically engineered to provide exceptional corrosion resistance for use in wet, humid, or marine environments, while others are appreciated for their ease of sharpening and ability to quickly return to a razor-sharp edge in the field. Understanding the strengths and tradeoffs of different steels can be instrumental in selecting the right knife for someone’s everyday—and not-so-everyday—cutting tasks.

For some enthusiasts, the appeal goes even deeper. Many collectors and steel aficionados actively seek out multiple versions of the same knife model to better understand how various steels perform in real-world use. Comparing identical knife patterns made with different blade materials allows users to isolate and appreciate the unique performance characteristics of each steel. This same spirit of experimentation, education, and hands-on discovery also defines projects like the Spyderco Mule Team™, which gives steel enthusiasts a unique platform for direct steel testing and comparison. By keeping the blade shape, grind, and overall geometry consistent while changing only the blade material, Mule Team knives allow users to experience the nuances of different steels in the clearest and most meaningful way possible.

Whether studying alloy compositions through the Steel Chart, comparing steels side by side with our interactive online comparison tool, or experiencing those differences through everyday carry and real-world use, understanding blade steels helps customers make more informed decisions and gain a deeper appreciation for the craftsmanship and engineering behind modern knife design.